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These electro-magnetic locks are designed to be installed into the frame of a sliding door or into the rebate of door frames for concealed installations.
It is also quite common for mortice magnets to be installed within a transom bar across the head of the door or down the door-frame rather than just at the head of the door. For higher security 2 or more locks may be installed in the transom bar to increase the holding pressure along the entire leading edge of the door. |